PYTHON的英文介绍。(实用).pdfVIP

Python Definition:Python is an object-oriented,open-source programming language often used for rapid application development.Pythons simple syntax amphasizes readability,reducing the cost of program mantenance, while its large library of functions and calls encourages reuse and extensibility. Among the languages favored by Web developers and innovators,particularly those in the open-source community,three of the most popular are Perl,PHP and Pyhon.Though Perl and PHP are more mentioned,but we cannot neglect Python,which is emerging as a powerful alternative to themoretraditional choices. Python is attractive because of its ease of use;its high level of abstraction from the hardware;its extensive support for housekeeping activities such as I/O,memory management,data typing and variable binding;and,perhaps most important,the fact thatprogrammerscanbehighlyproductivewith thelanguage. Python was created in the late 1980s by Dutch programmer Guido van Rossum and was named after the BBC television comedy seriesMonty Python sFlyingCircus. You can consider Python either a scripting language or a regularprogramming language. It offers an interactive mode for quick development and testing,as well as noninteractive modefor easeofreuse. In fact ,Python dose not actually contain anything new every feature has been taken from some other language.Thesepractical capabilities arewrappedup in a simple packagethats available for anyoneto download andusewithout restriction;not eventheGNU PublicLicenseapplies. Likejava,Python has a small core and a large, extensible library of functions and procedures.Thus,most ofwhat aprogrammer is likely to need already exists in written,tested from and can be used with simple library calls glued together with a small amount ofnew code. One measure of Pythonsprogrammer-friendliness is itsreliance on a simple indentation hierarchy for groupi